Elite Talent Hub are currently working with a well-established Irish engineering contractor specialising in water and wastewater infrastructure on a Commissioning Process Engineer appointment. This is a hands-on, site-facing role supporting the commissioning and optimisation of treatment plants across multiple projects nationwide.The position suits someone who enjoys being close to the process — from raw influent through to treated water performance — and who wants exposure to full life-cycle commissioning, optimisation, client sign-off and continuous improvement rather than desk-based design only.Key ResponsibilitiesSupport the commissioning, start-up and optimisation of water and wastewater treatment processes across live projects.Prepare and execute process commissioning test documentation in collaboration with project and design teams.Carry out jar testing, on-site sampling and laboratory analysis to determine optimum chemical dosing and process setpoints.Set initial PLC/HMI/SCADA process parameters and provide increased-care support post handover of flows.Monitor plant performance, alarms and trends, making and documenting process adjustments to meet compliance and performance targets.Compile commissioning, validation and performance reports for client submission and sign-off.Support troubleshooting, fault-finding and optimisation of existing treatment processes, including sludge treatment systems.Work closely with site teams and clients to ensure a collaborative, solutions-driven commissioning phase.Key SkillsDegree-qualified (Level 7 minimum) in Chemical, Environmental, Water/Wastewater Engineering or similar.3+ years' experience in a process commissioning or operations role within water or wastewater treatment.Strong understanding of water and wastewater treatment processes, including clarification, filtration and chemical treatment.Hands-on experience with sampling, on-site laboratory testing and process optimisation.Familiarity with PLC/SCADA-driven treatment systems and process data analysis.Strong communication skills and confidence dealing directly with clients during commissioning and handover.Full driving licence and flexibility to travel to sites nationwide.INDETH-M